STM32F4 Discovery

This page is for the STM32F4 Discovery board with STM32F407VGT6, STM32F4 Disco is a familiar board with STM32F401VCT6, do not use this Files for the Disco board !

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Overview

• STMicroelectronics STM32F4VGT6 Cortex M4 MCU, up to 168Mhz with floating point unit (FPU), 192 KB RAM, 1024 KB Flash
• on-board STLinkv2 with SWD header (capable of programming onboard or external MCU)
• on-board power regulator for the MCU (3V or 5V Input)
• 1 x user push button
• 4(5) x LED (orange, green, red, blue, green)
• 4(6) x UART (UART1, UART2, UART3, (UART4, UART5), UART6)
• 1(3) x SPI (SPI1, (SPI2, SPI3))
• 2(3) x I2C (I2C1, I2C2, (I2C3))
• 6 x ADC inputs (one is used for BAT voltage)
• 1 x PPM input
• 1 x Spektrum input (with bind pin)
• 97 x 66 mm PCB
• 4 x status LED (USB red, USB green, power, USB OTG green, USB OTG red)
• LIS302DL MEMS 3 axis accelerometer on SPI1

Pinout

left pin bank in relation to paparazzi(not up to date!)

right pin bank in relation to paparazzi(not up to date!)

The Discovery has a male 100 pin (2x25pin on both sides, also accessible on both sides of the pcb) pinout.

LED

Pin #	Name	Type	Description	Color
PD13	LED_3	Out	above LIS302DL	Orange
PD12	LED_4	Out	left of LIS302DL	Green
PD14	LED_5	Out	right of LIS302DL	Red
PD15	LED_6	Out	below LIS302DL	Blue
PA9	LED_9	Out	same as USB power (VBUS, needs to be enabled in header file	Green

UART1

Pin #	Name	Type	Description
PB6	UART1 TX	Out	UART1 Serial Output, 4k7 pullup for I2C
PB7	UART1 RX	In	UART1 Serial Input

UART2

Pin #	Name	Type	Description
PD5	UART2 TX	Out	UART2 Serial Output
PD6	UART2 RX	In	UART2 Serial Input, also used for Spektrum input

UART3

Pin #	Name	Type	Description
PD8	UART3 TX	Out	UART3 Serial Output
PD9	UART3 RX	In	UART3 Serial Input

UART4 (Can NOT be used if SPI_3 is active!)

Pin #	Name	Type	Description
PC10	UART4 TX	Out	UART4 Serial Output
PC11	UART4 RX	In	UART4 Serial Input

UART5 (Can NOT be used if SPI_3 is active!)

Pin #	Name	Type	Description
PC12	UART5 TX	Out	UART5 Serial Output
PD2	UART5 RX	In	UART5 Serial Input

UART6

Pin #	Name	Type	Description
PC6	UART6 TX	Out	UART6 Serial Output
PC7	UART6 RX	In	UART6 Serial Input

SPI1 (for onboard LIS302DL)

Pin #	Name	Type	Description
PA5	SPI1 SCK	I/O	SPI1 Serial clock
PA6	SPI1 MISO	I/O	SPI1 Master In Slave Out
PA7	SPI1 MOSI	I/O	SPI1 Master Out Slave In
PE2	SPI SS0	I/O	SPI1 Select Slave0

SPI1

Pin #	Name	Type	Description
PB3	SPI1 SCK	I/O	SPI1 Serial clock
PB4	SPI1 MISO	I/O	SPI1 Master In Slave Out
PB5	SPI1 MOSI	I/O	SPI1 Master Out Slave In
PE2	SPI SS0	I/O	SPI1 Select Slave0

SPI2 (Can NOT be used if PWM10 & PWM11 is active!)

Pin #	Name	Type	Description
PB13	SPI2 SCK	I/O	SPI2 Serial clock
PB14	SPI2 MISO	I/O	SPI2 Master In Slave Out
PB15	SPI2 MOSI	I/O	SPI2 Master Out Slave In
PE7	SPI SS1	I/O	SPI2 Select Slave1

SPI3 (Can NOT be used if UART4 & UART5 is active!)

Pin #	Name	Type	Description
PC10	SPI3 SCK	I/O	SPI3 Serial clock
PC11	SPI3 MISO	I/O	SPI3 Master In Slave Out
PC12	SPI3 MOSI	I/O	SPI3 Master Out Slave In
PE3	SPI SS2	I/O	SPI3 Select Slave1

I2C1

Pin #	Name	Type	Description
PB8	I2C1 SCL	I/O	I2C1 Serial Clock
PB9	I2C1 SDA	I/O	I2C1 Serial Data

I2C2

Pin #	Name	Type	Description
PB10	I2C2 SCL	I/O	I2C2 Serial Clock
PB11	I2C2 SDA	I/O	I2C2 Serial Data

I2C3 (Can NOT be used if Spektrum bind / PPM input is active!)

Pin #	Name	Type	Description
PA8	I2C3 SCL	I/O	I2C3 Serial Clock
PC9	I2C3 SDA	I/O	I2C3 Serial Data

Note: is disabled in header file, PA8 is used as Spektrum bind pin, PC9 is used as PPM (not Spektrum) input

ADC

Pin #	Name	Type	Description
PB1	AUX1	I/O	ADC_1
PC5	AUX2	I/O	ADC_2
PC4	AUX3	I/O	ADC_3
PA4	BAT	I/O	ADC_4, is used for BAT voltage
PC1	AUX5	I/O	ADC_5
PC2	AUX6	I/O	ADC_6

PWM

Pin #	Name	Type	Description
PE9	PWM0	Out	Servo 1
PE11	PWM1	Out	Servo 2
PE13	PWM2	Out	Servo 3
PE14	PWM3	Out	Servo 4
PE5	PWM4	Out	Servo 5
PE6	PWM5	Out	Servo 6
PA3	PWM6	Out	Servo 7
PA2	PWM7	Out	Servo 8
PA1	PWM8	Out	Servo 9
PA0	PWM9	Out	Servo 10
PB14	PWM10	Out	Servo 11, Can not be used if SPI2 is active
PB15	PWM11	Out	Servo 12, Can not be used if SPI2 is active

PPM

Pin #	Name	Type	Description
PC9	PPM	In	PPM input (remember, you need 100 Ohm serial termination in order to use this)

Spektrum

Pin #	Name	Type	Description
PA8	Bind	Out	Spektrum bind pin
PA10	PPM	IN	Spektrum PPM in

Jumper

Jumper

Pin #	Name	Type	Description
JP1	JP1	Switch	MCU Current can be measured here
CN3	CN3	Switch	closed: STLinkV2 is connected to onboard MCU, open: is not connectec to onboard, only external header

Soolder Jumper

Pin #	Name	Type	Description
SB17	SB17	Switch	Bypass for JP1, close this for security ! (if JP1 gets loose)

Daughterboard

comming soon :) git repo

Components:

Diode: Standard types (like 1N4007) will work
Resistors: 2k2 and 22k, 0,1%
Caps: Low ESR type, 10-50µF

Another option with Molex connectors, levelshifters for I2C and SPI, as well as connectors for Spektrum satellites and a can phy would be:

Currently under testing, eagle files are coming, when its completely finished and airworthy :-)

Firmware Flashing

FLASH_MODE=STLINK is set as default

STM32F4 Discovery can mainly be programmed in two different ways:

STLINK

• with onboard STLinkV2 over SWD
• required hardware: usb to mini USB cable
• required software: st_flash and st_util from Texane
• more information: STLink page

DFU-UTIL

• with the MCU native (embedded in rom) DFU USB bootloader over the micro USB AB connector
• required hardware: USB to micro and USB to mini usb cable
• required external software: dfu-util
• push MCU in DFU mode: connect mini(for power) and micro USB to PC, connect pin BOOT0 with 3V, press reset button(LED LD7 should light up now), disconnect BOOT0
• more information: DFU page